Uncategorized

Archive for the ‘Uncategorized’ Category

Laser Diode Housing from Hardware Store Parts

Laser Diode Housing, MacGyver'ed

Laser Diode Housing, MacGyver'ed. The focus is not THAT horrible, the camera picked up too much splatter.

I never seem to be able to finish my laser engraver/cutter from broken DVD-RW drives project (inspired by Groover’s pocket laser engraver) because I keep opening new DVD drives and keep finding reasons to go on tangent mini-projects. Most of those mini-projects are brought about by my admiration of the amount of useful parts a DVDs has (even a broken one, apparently) and some are caused by specific challenges each new opened drive brings. So, at some point I opened an HP SDVD8821H DVD R/RW/RAM Drive and found this laser diode inside:

Laser diode on a chip with PD arrays (front)

Laser diode on a chip with PD arrays (front)

Laser diode on a chip with PD arrays (back)

Laser diode on a chip with PD arrays (back)

It’s a weird looking laser diode (LD) that is mounted in the same case with the photodiode arrays which makes for simplified optics but I did not have any housing for this shape/size diode. By the way, if anyone reading this knows a professionally made housing for this type of LD, please post a comment with the reference, I would greatly appreciate that. The diode is just slightly smaller than your more standard 9mm LD – it’s smaller diameter is 6.50mm and the larger diameter is 8.25mm so it fits neither 5.6mm nor 9mm standard size housings.
This made me think that I may not be the only one stuck without a proper housing for a laser diode and I decided to see what it would take to build a housing for a laser diode out of parts available only in the disassembled drive itself and in a local hardware store. Here is what came out
Read the rest of this entry »

First post

Well, this is the first post at Elabz.com. We plan on making this site a diary about electronics projects and a repository of tools and downloads for the fellow electronics enthusiasts. Please come back soon for more info.

Related Posts
Tools

Coming soon ...

Recent Comments
  • TMM-Bako Choice: Hello, I need to underline how useful is that page, so informative. Thanks to everyone for sharing...
  • Bruce: Thanks for taking the time to answer. I truly appreciate it.
  • admin: Thanks for stopping by, Bruce. It has been awhile since I have updated or frankly, even looked at the circuit,...
  • Bruce: Hello First off, let me say that I like your design with LT1121, as compared to the other LM317 designs,...
  • Robert: Thanks for you reply. I’m following a tutorial (https://www.instructables....
  • admin: Thank you for stopping by, Robert. To be honest, it’s been a couple of years since I looked at the code....
  • Robert: Hello, can you explain why the 24 coil 22 pole motor I’m using (model BGM4108-130) does not rotate...
  • Ron: One correction. The original 7200-BN bulbs were 2.5 watts. I also have 3 of the vented replacements left for...
  • Ron: I have some of the upgraded 7200LED-BN bulbs that LOA sent me a year or so after I installed 2 4-puck strings in...
  • Chisight: You seem to be trying to implement a constant current supply but the LT1121 doesn’t have a constant...
Meta